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ES2526333T3 - Adaptive transition frequency between noise refilling and bandwidth extension - Google Patents

Adaptive transition frequency between noise refilling and bandwidth extension Download PDF

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Publication number
ES2526333T3
ES2526333T3 ES12196913.3T ES12196913T ES2526333T3 ES 2526333 T3 ES2526333 T3 ES 2526333T3 ES 12196913 T ES12196913 T ES 12196913T ES 2526333 T3 ES2526333 T3 ES 2526333T3
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Prior art keywords
transition frequency
frequency
spectral coefficients
initial set
noise
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ES12196913.3T
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Spanish (es)
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Anisse Taleb
Manuel Briand
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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/0204—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders using subband decomposition
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/028—Noise substitution, i.e. substituting non-tonal spectral components by noisy source
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/032—Quantisation or dequantisation of spectral components
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/032—Quantisation or dequantisation of spectral components
    • G10L19/035—Scalar quantisation

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Quality & Reliability (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

Método para la recuperación de espectro para la descodificación espectral de una señal de audio, que comprende las etapas de: obtener (210) un conjunto (42) inicial de coeficientes espectrales que representan a la citada señal de audio; dividir los citados coeficientes espectrales del citado conjunto (42) inicial de coeficientes espectrales en una pluralidad de bandas de frecuencia (74); determinar (212) una frecuencia de transición (ft); rellenado con ruido (214) de agujeros espectrales en el citado conjunto (42) inicial de coeficientes espectrales por debajo de la citada frecuencia de transición (ft); y extender el ancho de banda (216) del citado conjunto (42) inicial de coeficientes espectrales por encima de la citada frecuencia de transición (ft); donde la citada frecuencia de transición (ft) es ajustada al límite superior de la primera banda de frecuencia visto desde el lado de la frecuencia alta que tiene en él un coeficiente cuantificado.Method for spectrum recovery for spectral decoding of an audio signal, comprising the steps of: obtaining (210) an initial set (42) of spectral coefficients representing said audio signal; dividing said spectral coefficients of said initial set (42) of spectral coefficients into a plurality of frequency bands (74); determine (212) a transition frequency (ft); noise filling (214) of spectral holes in said initial set (42) of spectral coefficients below said transition frequency (ft); and extending the bandwidth (216) of said initial set (42) of spectral coefficients above said transition frequency (ft); where said transition frequency (ft) is adjusted to the upper limit of the first frequency band seen from the side of the high frequency which has a quantified coefficient therein.

Description

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Claims (1)

imagen1image 1 imagen2image2
ES12196913.3T 2007-08-27 2008-08-26 Adaptive transition frequency between noise refilling and bandwidth extension Active ES2526333T3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US96813407P 2007-08-27 2007-08-27
US968134P 2007-08-27

Publications (1)

Publication Number Publication Date
ES2526333T3 true ES2526333T3 (en) 2015-01-09

Family

ID=40387561

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ES08828148T Active ES2403410T3 (en) 2007-08-27 2008-08-26 Adaptive transition frequency between noise refilling and bandwidth extension
ES12196913.3T Active ES2526333T3 (en) 2007-08-27 2008-08-26 Adaptive transition frequency between noise refilling and bandwidth extension

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Country Status (11)

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US (5) US9269372B2 (en)
EP (2) EP2186086B1 (en)
JP (2) JP5183741B2 (en)
CN (1) CN101939782B (en)
BR (1) BRPI0815972B1 (en)
DK (1) DK2571024T3 (en)
ES (2) ES2403410T3 (en)
MX (1) MX2010001394A (en)
PL (1) PL2186086T3 (en)
PT (1) PT2571024E (en)
WO (1) WO2009029037A1 (en)

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DK2571024T3 (en) 2015-01-05
HK1143239A1 (en) 2010-12-24
BRPI0815972A2 (en) 2015-09-29
US11990147B2 (en) 2024-05-21
US20160086614A1 (en) 2016-03-24
EP2571024A1 (en) 2013-03-20
BRPI0815972A8 (en) 2017-11-14
CN101939782B (en) 2012-12-05
BRPI0815972B1 (en) 2020-02-04
ES2403410T3 (en) 2013-05-17
CN101939782A (en) 2011-01-05
US20190122680A1 (en) 2019-04-25
US20110264454A1 (en) 2011-10-27
PT2571024E (en) 2014-12-23
EP2571024B1 (en) 2014-10-22
US9269372B2 (en) 2016-02-23
EP2186086A1 (en) 2010-05-19
JP2013117730A (en) 2013-06-13
EP2186086B1 (en) 2013-01-23
WO2009029037A1 (en) 2009-03-05
US20210110836A1 (en) 2021-04-15
MX2010001394A (en) 2010-03-10
EP2186086A4 (en) 2012-01-25
US20170301358A1 (en) 2017-10-19
US9711154B2 (en) 2017-07-18
US10199049B2 (en) 2019-02-05
JP5183741B2 (en) 2013-04-17
PL2186086T3 (en) 2013-07-31
JP5458189B2 (en) 2014-04-02
JP2010538318A (en) 2010-12-09
US10878829B2 (en) 2020-12-29

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